Audio tool

Convert AU Files to MIDI on Your Device

Make a MIDI copy of AU in your browser for music-event exchange. Nothing is sent away for conversion; this device creates the MIDI result.

Route AU → MIDI

or drop here · up to 500 MB

Max 50 MB per file

Preview (optional)

When your browser supports it, your audio plays here. You can still convert your file if preview does not load.

Ready

Use upload name

On-device encoding can work the processor harder than ordinary playback during this AU-to-MIDI job.
Large AU inputs may take several minutes on older hardware.
Review the beginning and end of MIDI after the download finishes.

MIDI serves DAWs, instruments, and notation tools, whereas AU commonly serves Unix workstations and older audio software.
For AU-to-MIDI delivery, plan for sound depending on the playback instrument.
After leaving AU, the receiving app must support the streams encoded inside MIDI, not only its extension.

AU to MIDI taking too long? Try a small source first to separate a performance issue from a format issue.
MIDI converted from AU not opening? Test a compatible player and inspect the output streams.
Match MIDI resolution, rate, channels, and codec to the published delivery rules.

When does AU to MIDI conversion make sense?

It is useful when AU media created for legacy workstation exchange must enter a MIDI system designed for music-event exchange.

Where is the AU source processed?

The browser prepares MIDI from AU on this device instead of sending the source to a remote conversion server.

How can I approve MIDI converted from AU?

Test the MIDI file in the receiving app and compare duration, channels and loudness with the AU source.

Quick use cases